Recently, I discovered a video about Light Emitting Diodes (LEDs) and Organic LEDs (OLEDs). How they work, the difference between them, clearly explained by inside industry experts. Learn about the inventors of the lights at the end of the program.
LEDs use pn junctions where holes and free electrons combine to form a photon at the boundary between the p and n type materials. The OLED uses thin organic (molecule with carbon) layers evaporated or deposited on a flat substrate material.